Oil burner



Oct. 27, 1925- Filed May 2l. 1925 Patented Oct. 27, 1925.

CLARENCE A. FIFER, 07F BALTIMORE, MARYLAND.

oIL BURNER. y

.'Application l'ed May 21, 1925.v Serial No.v 31,941.

To all whom t may concern.'

Be it known that I, CLARENCE A. Frrni'z, a citizen of the United States, residing at Baltimore, State of Maryland, vhave invented certain new. and useful .Improvements in Oil Burners, of'fwhich the following is a specification.

The present invention relates to means for mixing fuel velements for burning, and particularly for preparing fuel oils. The object is to provide a simple and highly 'eHective structure in whichthe liquid and gaseous elements are thoroughly commingled prior to theirdischarge at the point of'combustion.

The view in the accompanying drawing is a longitudinal section through the preferred embodiment ofthe invention.

A body is employed, which is designated 1, and is preferably of generally cylindrical formation, this body having an internal mixing chamber 2 of generally globular formation, the chamber at one end being formed into a contracted outwardly tapering throat 3. This throat, -in turn, opens into an enlarged delivery mouth 4 located on one end of the body. The other end ofthe body is externally threaded, as shown at 5, and is provided with a preferably tapered threaded bore 6 leading to the rear end of the ehamber 2.

A plug 7 is threaded into the bore 6 and terminates at its inner end in a nozzle 8 that extends across the main portion of the chamber 2 and terminates substantially at the junction of said body 2 with the throat 3. This plug has an outwardly extending nipple 9 that is externally and internally threaded as shown. The plug 7 has a central longitudinal bore 10 extending entirely through it and the nozzle portion 8 preferably has an enlarged internal annular groove 11. From this groove lead ports 12 that open through the inner end of said nozzle portion 8. Other ports 13 extend from the outer end of the plug outside the bore 10 and open through the sides of the nozzle portion 8 at the base thereof, or in other words at the inner end of the mixing chamber 2.

An oil supply pipe 14 has theouter end or nipple 9 of the plug 7 threaded into' its end, and therefore the interior of this pipe is in Comunication with the ports 13. A steam supply pipe 15 is threaded into the projecting nipple 9, and consequently is in communication with the bore 10, the groove 11 and the outlet ports 12. Preferably a steam pipe `16 is threaded into the bore 1() at the opposite end of the plug. to the steam pipe 15, and this pipe 16 extends through the throat 3 and mouth 4. As a consequence steam may be circulated directly through the apparatus.

Therear end of the body Vr1'is provided with longitudinal ports 17 which open into the chamber 2 opposite to the outlet end `of the ports v13. jThe ports 17 are air ports that lead from an internal chamber 18, formed in'a head 19, and preferablythreaded ony to the rearend of the body 1 and the rearwardly extending nipple 9 of the plugy 7. Preheated air from any suitable source is supplied to the'chamber 18 through a supply pipe, shown at 20.

The outer Wall of the internal mixing chamber 2 is provided with an inwardly and rearwardly exending flange 21 that is located adjacent to the free end of the nozzle 8. This flange constitutes a baffle or liquid returning device.

In using the device, fuel oil of suitable charcter is supplied to the conduit 14 and will obviously pass through the ports 13 and be discharged into the rear end of the chamber 2. At the same time preheated air supplied through the pipe 2O will enter said sol chamber 2 through the ports 17 in opposin tion to the oil. Steam passing through the conduits 15 land 16 will preheat the oil and a portion thereof will discharge through, the ports 12, thus causing an ej ecting action which Will draw the oil and air into the chamber where the tWo will mix and after- Wards also eommingle with the discharging steam, thereby vaporizing the oil and driving it out through the mouth 4 where it Will be burned. Any tendency of the liquid to creep or follow up the outer walls of the chamber 2 will be overcome by the baffle 21 which Will turn it backwardly, thereby causing it to be re-submitted to the iniiovving air.

From the foregoing, it is thought that the construction, operation and many advantages of the herein described invention will be apparent to those skilled in the art, without further description, and it will be understood that various changes in the size, shape, proportion and minor details of construction may be resorted to Without departing from the spirit or sacrificing any of the advantages of the invention.

lllhat I claim is:

l. In a burner, the combination with a ing chamber and through the outletr burner;

end7 for Conveying the steaml through said chamber, and means for delivering a part of the steam into the chamber to Commingle with the fuel thereinto delivered.

2. In a burner, the combination with a body having a mixing chamber, of means for supplying fuel to the mixing chamber, means for bringing steam into heat exchanging Vrelation with the fuel prior to its delivery into the chamber and conveying the steam through the chamber, means for delivering a part of the steam into the chamber to eommingle with the fuel thereinto delivered, and means for admitting air into the chamber.

3. In a burner, the combination With a body having an internal mixing chamber and a fuel outlet mouth at one end, of a .steam supply conduit extending entirely through the chamber from the other end and having an outlet delivering into the ehamber, an oil supply conduit surrounding the steam conduit anddelivering into the chamber, and means for admitting air into the chamber.

4. In a burner, the combination with a body provided With an internal mixing chamber having a contracted throat that terminates in an enlarged mouth opening through one end of the body, of plug threaded into the other end of the body and extending into the chamber, said plug having a bore and outlet ports leading therefrom to the Chamber, said plug furthermore having ports extending therethrough andV opening into the bottom portions of the chamber, a supply pipe threaded into the bore of the plug, a supply pipe intoiv which the plug is threaded7 said body having ports extending through-its rear end to the chamber, and a hollou7 head fitted on the body and having its interior in communication With the said last mentioned ports.

In testimony whereof, I aix my signature.

CLARENCE A. FIFER. 

